CV-900 / CV-1800 / CV-2800
HEAVY DUTY PROFESSIONAL AMPLIFIERS
USER MANUAL
IMPORTANT SAFETY INSTRUCTIONS
1. Read Instructions – All the safety and operating instructions should be read before
this product is operated.
2. Retain Instructions – The safety and operating instructions should be retained for
future reference.
3. Heed Warnings – All warnings on the appliance and in the operating instructions
should be adhered to.
4. Follow Instructions – All operating and use instructions should be followed.
5. Do not use this amplifier near water. The amplifier should not be used near water
or moisture or dripping or splashing — for example, in a wet basement, in the
rain, or near a swimming pool. Objects that contain liquids, such as vases, shall
not be placed on the ampllifier.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Pleaase install in a well ventilated
environment.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or
other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or gounding plug. Apolorized
plug has two lnades with one wider than the other. A grounding plug has two
blades and third prong. The wide blasde or the third prong is provided for safety.
If the provided plug does not fit into your outllet, consult an electician for
replacement of the obsolete outlet.
10. WARNING: The mains plug or amplifier power inlet is used as a disconnet
device, the disconnect device shall remain readily operable. Protect the power
cord from being walkied on or pinched particularly at theplugs, conenience
receptacles, and at the point where they exit from the amplifier.
11. Use only attachments/accessories specified by the manufacturer.
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2. Use this amplifier only withcarts and rack equipment rated
for this type of equipment. When a cart or rack is used use
caution when moving to avoid injury from a tip-over.
13. Unplug the amplifier during lightening storms or when
unused for longperiods of time.
14. Refer all servicing to qualified personnel. Servicing is required when the
amplifier has been damaged in any way, such as the power cord is damaged,
objects have fallen into the amplifier, the amplifier has been exposed to rain or
moisture, has been dropped or does not operate normally.
16.This amplifier should only be operated from the type of power source indicated
on the rating label. If you are not sure of the type of power coming from your wall
socket, consult your product dealer or local power company.
!7. WARNING: to prevent hazardous electrical shcok do not touch the conductive
parts of the out put terminals. The external wiring connected to these terminals
requires installation by a qualified technician.
18. This product is in compliance with EU WEEEE regulations.
Disposal of end of life of product shoud not be treated as
municipal waste. Please refer to your local regulations for
i
nstructions on proper disposal of this product.
CAUTION: To reduce the risk of electric shock, do not remove any
cover. No user-serviceable parts inside. Refer servicing to
qualified service personnel only.
The lightning flash with arrowhead symbol within the equilateral triangle is intended to alert the user
to the presence of un-insulated “dangerous voltage” within the product’s enclosure that may be of
sufficient magnitude to constitute a risk of electric shock.
The exclamation point within the equilateral triangle is intended to alert the user to the presence of
important operation and maintenance (servicing) instructions in the literature accompanying this
appliance.
CAUTION: To prevent electric shock, do not use this polarized plug with an extension cord, receptacle or other
outlet unless the blades can be fully inserted to prevent blade exposure.
"Protective earthing terminal.The amplifier should be connected to a mains socket outlet with a
protective grounding connection terminal. The amplifier should be connected to a mains socket
outlet with a proper gounding connection for safe operation.
Caution Hot Surface! Heat danger. Please don’t touch the area because a high temperature
danger may exist. Use caution when touching surfaces makred with this logo as they may become
hot during extend use.
This lightening flash is intended to alert the user to the presense of non-insulated “dangerous
voltage” on the output terminals that may be of sufficent magnitude to constitute a risk of electric
shock. The external wiring connected to the terminals requires installation by an instructed person or
the used of ready -made leads or cords. of
INTRODUCTION
Thank you for your decision to purchase Cerwin-vega’s innovative new CV Series professional power amplifier! Engineered for superior
sound reproduction, the CV Series line of professional amplifiers deliver top quality audio at an affordable price. The CV Series offer a standard of reliability and efficiency that makes them the perfect solution for every DJ, musician, and sound engineer. Welcome to a new level
of professional quality sound performance!
UNPACKING & INSTALLATION
Although it is neither complicated to install, nor difficult to operate your amplifier, a few minutes of your time are required to read this manual for a properly wired installation, and to become familiar with the unit’s features. Please take great care in unpacking the unit and do
not discard the carton and other packing materials. They may be needed when moving the unit and are required if it ever becomes necessary to return the unit for service. Never place the unit near a radiator, in front of heating vents, in direct sunlight, in excessive humidity, or dusty locations to avoid damages and to guaranty a long reliable use. Connect the unit with the system components according to
the description on the following pages.
FEATURES
• Cerwin-vega amplifiers deliver the following power ratings.
• CV-900 - 2 x 210 Watts at 8 ohm, 2 x 320 Watts at 4 ohm and 2 x 420 Watts at 2 ohm
• CV-1800 - 2 x 400 Watts at 8 ohm, 2 x 600 Watts at 4 ohm and 2 x 900 Watts at 2 ohm
• CV-2800 - 2 x 600 Watts at 8 ohm, 2 x 900 Watts at 4 ohm and 2 x 1400 Watts at 2 ohm
• 2-channel, parallel or bridged mono operating modes for flexible application 900 Watts for CV-900, 1800 Watts for CV-1800 and 2800
Watts for CV-2800
• Independent limiters for each channel reduce overload distortion
• Independent input level controls for each channel allow precision adjustments
• Precise signal and clip LED indicators to monitor performance, allow you to correct for overloading (clipping) condition
• Low-frequency filters (40 Hz) remove rumble and subsonic frequencies
• Twin-tunnel and two temperature-sensitivity forced-air cooling system to maintain a low operating temperature during use
• Balanced XLR or balanced 1/4-inch TRS Combination input connector for each channel and LINK ports
• 5-way output binding posts or Speakon® connectors enable secure operation
• High-current toroidal transformer for absolute reliability
• Independent DC and thermal overload protection on each channel automatically protects amplifier and speaker from damage or failure
• The CV-Series can be mounted in any standard 19” rack
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FRONT PANEL CONTROLS
1. Rack Ears
These ears are used to mount the amplifier in any standard 19”
rack.
2. Fan Vent
The CV-Series amplifiers are cooled by two rear-mounted fans (except for CV-900 which is cooled by a single rear mounted fan).
Cool air flows through the front fan filters, reducing the
temperature of internal components while forcing the heat out the
rear vents. Never block these vents and keep them clean at all
time.
3. AC Power Switch
This switch powers the unit on and off.
4. Signal Indicators
These blue LED's will illuminate to indicate that a signal is
present at the amplifier input, and that the signal is being amplified.
5. Clip Indicators
These red LED's will illuminate at the clipping threshold. These
lights should not light up during normal use as they indicate
signal outside of the amplification range of the amplifier. When a
signal is "clipped" and the clip indicator illuminates, it means that
the signal is being distorted at the output stage. Prolonged
clipping can not only damage your amplifier, but also your
speakers, so be careful to monitor the clip indicator during setup
and use. If the clip indicator is illuminated then simply lower the
channel gain or input signal until the indicator does not light.
These blue LED's indicate that AC power is connected and the amplifier is turned on.
7. Protect Indicators
These red LED's indicate that the channel is in Protect mode.
When the channel goes into protect mode all output for that
channel will be muted. The protect LED's light when overheating or
other severe problems occur. This is to protect any speakers connected to the channel. The LED's also light for approximately five
seconds whenever the unit is powered on and fade slowly when
the amplifier is powered off.
8. Channel input level control
These two 21-position detented potentiometers adjust input level
for their respective amplifier channels. In Bridged Mono Mode, only
channel 1 level control is used to adjust signal level. In Parallel
Mode, both input level control are used to adjust signal level for
their respective amplifier channels. At their fully
counter-clockwise position, the signal is attenuated by more than
80dB. At their fully clockwise position, the signal is at maximum
gain. When 0 dBu of signal arrives at the input jacks and the Channel input level controls are set to their fully clockwise
position, the unit delivers full power output.
6. Active Indicators
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REAR PANEL CONTROLS
1. Fan
This is a variable speed cooling fan. Cool air enters the amplifier
through the fan filters located on the front of the amplifier. Be sure
not to block these ports when installing the amplifier or other equipment.
2. Input connectors
Connect the input source to the balanced combo connectors using
either XLR or 1/4” TRS plugs. They are configured as follows : Pin
2 (Tip) hot, Pin 3 (Ring) cold, and Pin 1 (Sleeve) ground. We recommend using balanced three-conductor cabling wherever possible. Unbalanced two-conductor 1/4” plugs can also be inserted into
these inputs, but you will get better signal quality and less noise
and hum if you use balanced lines. Stereo signal should be connected to the Channel 1 and Channel 2 input jacks. When operating the unit in Bridged Mono or Parallel modes, use the Channel 1
input jack only.
3. Link connectors
These jacks are used to send a parallel signal to another device or
amplifier.
4. High Pass Filter (HPF) switch.
These switches are used to activate the built-in High Pass Filter.
The HPF rolls off signals below 40Hz. This improves bass performance by limiting sub-audio cone motion, making more power
available for the speaker’s rated frequency range. When the filter
is turned off, a 5 Hz roll off protects against DC or deep sub-audio
inputs.
7. 5-way Binding Post
Connect each channel of the unit to your speakers. Binding posts
®
are provided for each channel as well as Speakon
connectors, so
that paralleling of speakers is possible. Connection to the binding
posts can be made with bare wire, banana plugs, or spade lug
terminations. Make connections to both the Channel 1 and Channel 2 terminals for Stereo or Parallel Mode, or a single
connection across the red terminals only of Channel 1 and Channel 2 for Bridged Mono Mode.
8. Speakon® output connectors
You can use these to connect each channel of the unit to 8 ohms
or 4 ohms loudspeakers. Using Speakon® speaker cables, make
connections to both the channel 1 and channel 2 connectors for
Stereo or Parallel Mode, or to the Bridged mode connector for
Bridged Mono Mode.
9. Circuit breaker
The breaker acts in place of common disposable fuses. This circuit
breaker will trip if there is a fault with the main voltage or if maximum output is exceeded. Simply depress the circuit breaker and
power up the unit again.
10. AC input
IEC connector for AC power cable. Connect the supplied heavygauge 3-pin IEC power cable.
5. Limiter switch
When the input signal connected to your amplifier is too high, you
end up with a distorted output signal. To prevent this, both channels feature a clip limiter that can be engaged or disengaged selectively.
6. Bridge / Stereo / Parallel switch
This switch changes the amplifier operating mode between stereo,
mono bridged, and parallel.
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PROTECTION
Every model in the CV-Series incorporates protection features. The front panel Protection LED indicates the activity of the speaker
connection relay circuitry in each channel. When the protection LED turns on, this circuitry is active, and all connected speakers are muted.
Initial power-up : For approximately five seconds after initial
power-up, the protection circuitry is activated and the speaker out-
uts are muted. If everything is operating normally, you will hear an
p
audible click at the conclusion of this brief period, as the protection
circuitry is deactivated and the unit begins delivering signal to the
connected speakers. It is normal for the Protection LED to fade
radually after the amplifier is powered off.
g
Thermal Protection : Abnormally high heat sink temperatures will
engage the protection circuitry for the overheating channel only.
An output relay disconnects the speakers until normal temperature range is restored. The Protect indicator will light to show the
protection circuit is active. To guard against this problem, make
sure the unit receives adequate ventilation on all sides and that
both the front and rear panels are unobstructed. If the power transformer gets too hot, its thermal switch will disconnect all of the secondary power and disconnect both channel outputs.
Short circuit : If output is shorted due to faulty wiring, the thermal
circuitry will automatically protect the amplifier. If this occurs, the
load will be disconnected by the thermal protection circuitry.
DC Voltage Protection : If an amplifier channel detects DC voltage at the speaker output, the output relay will immediately open
to prevent speaker damage.
Subsonic Frequency Protection : The built-in High Pass Filter
provides subsonic frequency protection for each channel.
Current limiting Protection : At the amplifier’s full power limit, or
clipping point, the limiter circuitry will be activated. This is indicated
by illumination of the Clip LED. The channel gain is automatically
educed, protecting the speakers from high power. Uncontrolled
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feedback, oscillations, or improper equipment gain setting may activate this circuitry, which is virtually transparent in operation as full
signal bandwidth is maintained.
There is reason to be concerned any time the Protection LED lights
up (except for initial power-up during approximately five seconds).
If this occurs, turn the amplifier off immediately and check all wiring
and external equipment carefully in order to locate and correct the
condition.
SETUP
Clip limiter
Clipping is the result of an amplifier running into power supply limitation. The maximum output voltage that any amplifier can produce is limited by its power supply. Attempting to output a voltage
(or current) level that exceeds the power supply limit will result in
a flattening effect on the signal. A clipped waveform exhibits extreme harmonic distortion, making it sound harsh or dissonant. The
clip limiter detects this and reduces the gain to minimize the
amount of overdrive. To preserve as much of the program dynamics as possible, limiting reduces the average program level until
peaks barely clip. Each channel has its own clip limiter, which can
be switched on or off. When driving full-range speakers, clip limiting reduces high frequency distortion caused by bass overload. It
also protects higher frequency drivers from excess overdrive and
harsh clipping harmonics.
HPF (Hi-Pass Filter)
Also known as a low-cut filter, a High Pass Filter rolls off signals
below 40Hz. The reproduction of the signal’s bass portion is thus
optimized, since ultrCV-low, distracting frequencies are eliminated,
and more power is available for the reproduction of the wanted
segment of the signal.
You should set up the filters so they best suit the frequency response of your speakers, since some speakers are particularly
sensitive to over-excursion. The 40Hz filter works well with most
compact full-range speakers.
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SETUP
CONNECTIONS
Mode Select
Stereo Mode
In stereo mode, both channels operate independently with individual input gain controls. Signal at channel 1’s input produces output
at channel 1, while signal at channel 2’s input produces output at
channel 2’s output. Recommended minimum nominal load impedance for stereo operation is 2 ohms per channel.
Parallel Mode
When set to Parallel mode, a signal applied to channel 1’s input will
be amplified and appear at outputs for both channel 1 & 2. The
parallel mode is well suited for applications in which driving two
speakers with the same signal but with separate amplification. The
‘Channel1’ and ‘Channle 2’ input gain controls individually control
the out put level on channels 1 and 2.
Bridged Mono Mode
Bridged mono mode straps both amplifier channels together to
make a very powerful, single-channel monaural amplifier. One
channel ”pushes” and the other channel “pulls” equally, doubling
the power over that of either channel alone. Therefore the voltage
is doubled, the peak power is quadrupled, and program power is
roughly three times as high as that of the individual channel.
Stereo Mode
(5-Way Ouptut Binding Posts)
Parallel Mode
(5-Way Output Binding Posts)
Signal is applied to the channel 1 input only and channel 1 input
gain control is used to adjust signal level. The input gain control belonging to channel 2 are not used.
Note : Bridged mono mode is to be used only when the CV-Series
is connected to a 4 or 8 ohms speaker load. Use of Bridged mode
with speaker loads of less than 4 ohms can result in severe dam-
age to the unit due to excessive heat and current limiting.
Use extreme caution when operating the amplifier in
Bridged Mono Mode. Never ground either side of the
speaker cable; the speaker load must “ float “ away from the amplifier chassis.
Bridged Mono Mode
(5-Way Output Binding Posts)
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CONNECTIONS
B
A
B
A
B
B
Stereo Mode
Parallel Mode
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 2+
SPK- to PIN 2-
SPK+ to PIN 1+
SPK- to PIN 1-
Bridged Mono Mode
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 2+
SPK- to PIN 2-
SPK+ to PIN 1+
SPK- to PIN 2+
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WIRING
These are several ways to interface to the amplifier to support a variety of applications.
Unbalanced 1/4” Connector
Balanced TRS 1/4” Connector
Speakon®Connector
XLR Balanced Wiring Guide
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SPECIFICATIONS
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SPEAKER COMPATIBILITY
The CV Series of amplifiers are designed to work with many different speakers on the market. They have been paired with the following
Cerwin-Vega speakers. The following compatibility matrix can be used as a reference. (See: www.cerwin-veg com for product specs.)
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